Influenza virus surveillance among young children in São Paulo, Brazil: the impact of vaccination

Abstract

This study assessed the presence of influenza virus among young children and the coverage of vaccination from 2010 to 2012 in São Paulo, Brazil. Our results demonstrated a lower rate of influenza detection and a predominance of influenza B. A decrease of coverage vaccination through the surveillance periods was observed.

Influenza B viral load analysis in patients with acute respiratory infection from a tertiary hospital in Brazil

“…In the above-described study, the highest rate of infection was observed among those was reported in a study among young children. 19 However, considering that information regarding the time of vaccination was not available, these patients could have been recently vaccinated and, therefore, did not reached the adequate protective antibody titers, which are acquired at least 2 weeks postvaccination. Nonetheless, all vaccinated patients were not later hospitalized, which could point to some immunization protection.…”